1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6a86f4476a8b5ec773c591e997571fbf1e55d5d0d8e4ab5d62438da313b3b4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41de62d2-590e-4086-afa2-419887c1dcf6.json and https://artists.proofprofile.net/proofs/artist/41de62d2-590e-4086-afa2-419887c1dcf6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14c5ace9dc6ed508e509b91fd3cc4288573d679fd00e3f12554246f1d18414e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2319879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2d139648333dd6fd399d24a2e0644fe924b9eb1d65b38968e746e37e1b6d79. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2147962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1367ce62bc4e67de57665a016622c8faed27cf9372ebd8ab8b700cae36fad629. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2147971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cd5631742b3e165cdb7fe668a38acb693e7c3864008e36358d20a3c874fe59. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2124031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3169cee3f86498b37fa5c87ef95e8bf4ea80e74e9dcb383fb705bc66f30a6717. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB1600608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b437483f004f281d7d92b8d9d3bb8999b694a8ecc3e812fc69760700c8b70. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2116021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b9e65ff6b41927d315ab212e658d3daf829d38be6147b915a58bac3e575e6e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2116570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af310dd724bf9e3837f8da4e3172d76c5a3594b0857fc0e68cbd93321b5f132. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB1600614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56172b668bcb1decc108ff923a32e1cc4be7c84ec8c43a486dc9823331d52f3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2211809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d95df3dde6afa40f72ad1c7456704a4bad5e94b9f744690b0fef7a80d4f29a2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2124040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e81fe4c1adf410f32136646b7f67bee586cdcd82d70dae14b9e04a9c1d9b5b. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2116507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0e6e2e8f065a2276ca08aa1a886bdc4098e5069c624ac2e3c6481088d504f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB1600600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a8d1675fa3e0901e69ed5bfa6b8fe2aa1f6ffa4db058adfdbfcc64c80d6367. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2116012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b27e8d4e75c51692082d02023d70420feaca7e1ee996c4fac8fe49d1e1d831. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2211569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a6e555fbd5990baf87fe4b4df37dee861a9df213932198691ce867b05582c3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB1600609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2d139648333dd6fd399d24a2e0644fe924b9eb1d65b38968e746e37e1b6d79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2147962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fbd502d87ef060da947da9cca49a7e1111dc85e581835c02fcf1c056796cda. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2124049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1abfd54cd98366f5c126130987af1683666f44cc43330c46e69c353c8a7a37. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2124220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab1306fd75eaf17af6a239c81b17653f5b03ede5d8efa31fe369689681f9dad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2124256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562c875388f575074822e0e9b2169c2b89fa9b941c16dc7a31e3e69f407e2dd2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2124247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dbaebd956bc71b0317cb026a3bd823e51424ae9fe967bf317caba934b979d4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2116498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096a2e438723d066221ddf0c83b6c724d4365453bfaa40c158a0a077ea486fb6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB1901265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6013eac7bd2ee7c6f5925614400f775fa67474ebc718ec5cfd9adc3cd6554c07. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB2107282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6288ead834db28d50fb5aacf1087c804e8ea2dc38d3ab66372aad69584eeedc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5IB1701298.